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Scan sequence generator

  • US 9,268,450 B2
  • Filed: 12/04/2014
  • Issued: 02/23/2016
  • Est. Priority Date: 01/03/2007
  • Status: Active Grant
First Claim
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1. A method of detecting events with a touch sensor panel device having plural rows of touch sensors, the method comprising:

  • applying a first stimulation signal having a first frequency to the plural rows of touch sensors to detect a position of an object touching the touch sensor panel device at or near a first touch sensing node;

    applying a second stimulation signal having a second frequency to the plural rows of touch sensors to detect a position of an object touching the touch sensor panel device at or near the first touch sensing node;

    applying a third stimulation signal having a third frequency to the plural rows of touch sensors to detect a position of an object touching the touch sensor panel device at or near the first touch sensing node;

    while applying the first stimulation signal, sensing an output of the touch sensors of the plural rows of touch sensors to thereby provide first outputs;

    while applying the second stimulation signal, sensing an output of the touch sensors of the plural rows of touch sensors to thereby provide second outputs;

    while applying the third stimulation signal, sensing an output of the touch sensors of the plural rows of touch sensors to thereby provide third outputs;

    determining a final result based on at least two of the first, second and third outputs; and

    utilizing the final result to determine the position of touch, near touch or hover location on the touch sensor panel device.

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